Patents by Inventor Lothar Bäcker

Lothar Bäcker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Preparation of aliphatic oligocarbonate diols
    Patent number: 7420077
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: September 2, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Bäcker, Herbert Witossek
  • Preparation of aliphatic oligocarbonate polyols
    Patent number: 7317121
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate polyols by transesterifying dimethyl carbonate (DMC) with an aliphatic polyol component.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: January 8, 2008
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Herbert Witossek, Lothar Bäcker
  • Preparation of aliphatic oligocarbonate diols
    Patent number: 7238825
    Abstract: The present invention relates to an improved process for preparing aliphatic oligocarbonate diols by transesterifying dimethyl carbonate (DMC) with aliphatic diols.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: July 3, 2007
    Assignee: Bayer MaterialScience AG
    Inventors: Steffen Hofacker, Rolf Bachmann, Lothar Bäcker, Herbert Witossek
  • Coating compounds, a process for their production and their use for the production of coatings
    Patent number: 6319981
    Abstract: The present invention relates to coating compounds of which the binder consists essentially of a combination of a) a polyol component dissolved and/or dispersed in water or a water/solvent mixture, and b) a polyisocyanate component emulsified in the solution and/or dispersion of the polyol component with a viscosity at 23° C. of 50 to 10,000 mPa.s, in quantities corresponding to an equivalent ratio of isocyanate groups of component a) to alcoholic hydroxyl groups of component b) of 0.5:1 to 5:1, characterized in that component consists essentially of a1) a water-dilutable, hydroxyfunctional polycondensate resin free from urethane and sulfonate groups and having a molecular weight Mn above 500 or a2) a mixture of such a polycondensation resin with up to 100% by weight, based on the weight of the polycondensation resin, of at least one water-dilutable, hydroxyfunctional polymerization resin having a molecular weight Mn above 500.
    Type: Grant
    Filed: April 13, 1994
    Date of Patent: November 20, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Knud Reuter, Lothar Bäcker, Joachim Probst, Werner Kubitza, Rainer Rettig